( 1) 1.2 3 1.8 (2) 42.54+3.5 (3) 1.5

Three. 3. 15 3.24 2.86

Four. 2033.9/ 12= 169 (mm)

Verb (abbreviation of verb) 52-4=48 (box) 48/4= 12 (box)

The intransitive verb B: 360/4/(1.25+1) = 40 (m/day) A: 40* 1.25=50 (m/day-

Vii. 1.22*6.4*0.6=36 (kg)

Eight, (1.2+1) * 0.77/2 = 0.77 (square meter)

Nine, 4*4-2*25/2= 14 (square centimeter)

X. (3+1.2) * (0.8+2.3) =15.02 (square centimeter) 0.8 *1.2+2.3 * 0.9/2+0.5 * 0.6/2+2.5.

Eleven, omitted, can't think of it.

Twelve. fair

Thirteen. 4.53 4.095 132 1.9 5.67 14.39

Fourteen ( 1)x = 25/9(2)x = 1.5(3)x = 0.9。

Fifteen. 32.99 3.09

Sixteen. 3.8* 180/3.6= 190 (unit)

17.3384*2/(84+60)=47 (m)